Pick and pick motion for box looms



A. A. GORDON PICK AND PICK MOTON FOR BOX LOOMS Filed April 2s. 192s s sheets-Sheet 1 March 27, 1928. 1,663,939

l1. t.) Q l n 7 March 27, 1928. t 1,663,939

A. A. GORDON PICK AND PICK MOTION FOR BOX LOOKS Wed April as. 192e s sheets-sheet 2 59 sa f [fn/en for March 27, 1928. l' 1,663,939

' A. GORDON A PICK AND PICK MOTION F0A BOX LOOKS Filed Ap 2s. 192e s sheets-sheet 3 CIG Patented Mar.' 27, 192s.

AUNITED STATE-s PATNT OFFICE.

ALBERT Agoonnon, orwonciisfrnn, MAssAcriiisnTTsAssreivon To CitoMrToii & i

lKNOWIQES LOOM WORKS, OF WORCESTER, MASSACHUSETTS, A CORPORATION OF MASSACHUSETTS.

P10K A161: rmx MOTION son Bex Looms.

yApplitation med April 23, 1926. Serial No. 104,186.

This invention relates to improvements in multiplier devices forbox motions of looms and it is the general object of the invention to providel a simple form of device for use in connection with looms weaving crepe .and other fabrics requiring two picks to be laid byvone shuttle to be followed by two picks from another shuttle.

The usual form of box motion of the type to which my invention relates can be used in connection with the ordinary multiplier when it is desired to count a comparatively large number of picks which are laid by any one shuttle', the multiplier chain under these conditions being given a movement for every second pick where there Vis a' Single box on one end of the loom and the `box chain ren'iaining at rest until the multiplier chain has made a complete revolution, at which time a return indication is given to the box chain and the latter moves forward one space. If the color is still to remainy active the next bar of the pattern chain will be the same as the one which lirst started the n'iultipli'er chain, Ythe number of pickstaken care of by the multiplier being double the product of the multiplier chain links by the pattern chain bars of the same layout as originally called the multiplier chain.

In certain kinds of fabrics, such as crepe for instance, itis desirable to lay two picks from one shuttle and then two picks from another, Itheshuttles Valternating` in pairs of picks for a given length of time, afterwhich a var iegated pattern can be woven. Multipliers of the present form cannot be'used for weaving a block of colorformed of alternate pairs of picks from different shuttles because the multiplier chain will ordinarily move between movements of the pattern chain. and where the patternchain must move every two picks, the multiplier chain does not Agiet( a chance to, operate. frFor this reason it has heretofore been necessary,. in building the pattern-chain for any repeat which hase crepe. or a similar portion, to provideone chain bar yfor cach pair of picks of crepe.. For instance, avrepea't is lOO picks long and 40 of these are for crepe and theA other G0 for some vari-colored pattern, the pattern chain 4will contain 50 bars, remembering thatvone bar suiifices vfor two picks,` Z O of the bars being used for that part of the calling for crepe and the other bars being for the vari-colored part of thepattern, there being l0 bars of one kind and l0 of another for the crepe and the bars beingY alternated.

It is an important object of my invention to provide a boxinotion which will permit a multiplier chain to be used instead of 'the section of box chain corresponding to the 40 picks assumed above, my invention reducingY the patternchain from to 3l bars and employing a multiplier chain of 20 bars to be called by the 31st bar of the pattern chain. A saving is effected in this way because of the fact that the pattern chain may be four spaces or `more wide whereas the multiplier chain will be onlyone space wide. p l

The usualA form of Crompton box motion employs a master gear, on the bottom shaft' rotating ,every second Vpick of the loom. The master vgear willlhave one segment'for 'each pairv of shuttle boxes and each segment will cooperate with yone pinion through the rotation of which 'the box lever'is either raised or lowered. Each pinion has diametrically opposite slots? in which slide the starting` teeth,'said teeth being in different planes so that but one of them can b e acted upon by the segment during any movement of the pinion. IfV the box lever is to be changed andniaintained inV its new position, the tooth which was out of the plane of the segment will be moved toward the latter so that asV it approaches the pinion the leading tooth of the segment will engage the starting' slidingtooth and give the pinion a half revolution. The startinggfr toothr willv then be on the side of the pinion opposite the segment andwill not be in position to be again acted uponbythe segment when the latter .makes'kits next rotation. The box lever will therefore remain in'its ,new position ybecause of the fact that one of the starting sliding` teeth is out of the'plane `of the segmentn'and the otherptooth in such position that it cannot be reached by the seeL ment. y I

My invention consists of an auxiliary starting' toothnormally out` of the plane of the Segment but slidable into the path thereof so that when weaving crepethere will be two startingteeth in the plane of. the see'- ment one of which will always be in the path direction of arrow 2, Fig. 1 and showing the of the leading tooth of the segment. By this construction the pinion, and hence the boxes, Will be moved every time the segment completes a rotation Without requiring a change of the pattern chain inasmuch as the regular and auxiliary starting teeth remain the same With respect to the pinion. It is a still further object of my invention to provide a box motion anda pattern mechanism wherein two pattern levers controlled independently of each other by the pattern chain may both control the same pinion.

I have chosen te illustrate my invention in connection with the well-known form of Crompton box' motion comprising a oonstantly rotating master gear havingr a plurality of segments of gear teeth which are brought into Contact With box lever' actuatingppinions by means of sliding teeth, as set forth in Patent No. 364,697. y

IVith these and other objects in view which Will appear as the description proceeds, my invention resides in the combination and arrangement of parts hereinafter described and set forth in the claims.

In the accompanying dravfings wherein I have shown a convenient embodiment of my invention,

Figyl is a side elevation of a loom showing the box motion pattern mechanism With my invention applied thereto,

F ig. 2 is a top plan view looking in the levers Which are controlled by the pattern chain and the multiplier,

Fig. 3 is an'enlarged partly vertical and partly diagonal section on line 3-3 of Fig. 1, my invention in this figure being shown inoperative to permit the box motion to be used in the usual manner,

Fig. 4 is a top plan of the box motion,

Fig. 5 is a view similar to a portion of Fig. 3 butr showing my invention in position to permit the Weaving of crepe or other patterns calling for colors in alternating pairs of picks,

Fig. 6 is a vertical section on line 6 6 of Fig. 3, and

Fig. 7 is a detail vertical section on line 7--7 of Fig. 5.

Referring more particularly to Fig. 1 it will be seen that I have provided a loom f'ame 10, lay 11, shuttle boxes 12, box rod 13, and yielding lifter 14 connected to box lever 15, all of the usual construction. Said lever is pivoted as at 16 on a shorter lever 17 Y pivoted at 18 on the box motion stand 19.

gear teeth 22 and 23.

Lacasse secured thereto crank plates 27 which are pivotally connected by means of studs 28 to links 29, the studs 28 being eccentric with respect tothe shafts so that as the latter rotate the links 29 will be raised and: lowered.

Theparts carrie-d by the support 25are substantially the same and a description of one Will suffice for, both'. i Y

'Ihe frontshaft 26 has a pinion 30 secured thereto by key 31v as shown in Fig. 7. Said pinion lis provided vvith oppositely disposed slots 32 Which receive the long and short arms 33 and 34, respectively, of a. sliding member 35 Which is grooved as at 36 to receive the actuating finger 37 of a control lever 38. The Varm 33 is provided at its extremity With a starting tooth 39 While the shorter arm 34 is provided near its extremity with a similar starting tooth 40. The control lever 38 is actuated by connector 41 which is connected to pattern lever 42 piv.

oted to a fixedstud l43 as shown in Figs. 1 and 2.

The pattern lever 42 is raised and lowered by a pattern chain 45 mounted ona cylinder 46 keyed to a short shaft 47, see Figs. 1 and 2. A clutch member 48 is fastened to shaft 47 and has notches to cooperate with a tooth 49 on a clutch member 50 slidable along shaft 47. Said member 50 has a groove 51 to receive the end 52 of a lever pivoted at` 53 and having an arm 54 which lies over the multiplier chain 55. The multiplier chain is mounted on a cylinder 56 keyed to a second shortshaft 57 which has secured thereto a clutch member 58 similar to'member 48. A secon-d clutch member 5.9 is mounted to slide along shaft 57 and has a tooth 60 to cooperate with notches in member 58. Said member 59 is grooved as at 61 to receive end 62 of a lever 63 which is pivoted at 64 and hasv an end 65 to extend over one section of the pattern chain 45. The shafts 47 and 57, together With levers 54 and 63 are mountcdon a stand 66 supported by the loom frame.

p Asshownin Fig. 2 an upright shaft 67, constantly driven by mechanism not shown,

` has keyed thereto a Worm 68 which meshes with worm gears 69 and 70 turning loosely on shafts 47 and 57, respectively. The worm gears 69and 70 are driven on sleeves 71 and 72, respectively, said sleeves having cast integral therewith collars 73 and 74, respectively, Which guide the teeth 49 and 60. The Worm is Vformed with a dwell so that one ofthe Wormgears is at rest while the other is being turned by the Worm. The pattern and multiplier chain mechanisms just described are similar in construction and operation to those found in Patent No. `656,592 to lVyman. It is suflicient for present purposes to state that pattern cylinder 46 will be brought to rest When end 65 of lever 63A is raised by a ball on pattern chain 45 and that multiplier chain 55 Will thereafter beico ieaaee gin to move and lower lever 51k, inthis way disengaging tooth- 49 from clutch member 48 to arrest the pattern chain. Then the multiplier chain has made a complete revolution, or when kanother ball arrives under lever 54, the pattern chain will again begin to move.. In this way the levers over the pattern chain remain at rest while the multiplier chain operates.

In the operationiof the device so far described the pattern chain will receive a movement for each second pick. of the loom and will raise or lower the lever 4t2 according to the demands of the pattern. p teeth 39 and 40 are so related with respect to the segment -23 that but one of the starting teeth will be in operative position with respect to the master gear 21, the tooth 39 being shown in alignment with the segment 23 in F 3 while the tooth 40 is out of the plane of the segment.r In order to effect a change from the position shown in Fig. 3 the control lever 38: would be raised whereupon tooth 39 would move out of position and ytooth 40 would move into position with respectto segment 23 and as the master gear rotates said segment 23 would engage the starting tooth 40? and give the pinion 30 a half revolution at the conclusion of which the starting tooth 4() would be diametrically opposite the bottom shaft 20. When a return to the position shown in Fig. 3 is desired the control lever 38 will be depressed and the .tooth 39 which was` moved to a position between the bottom shaft 20 and the shaft 26 by whichlit is supported will be in operative position with respect tothe segment 23. 1

It is to vbe understood that each segment controls one of the pinions and that as the latter rotate their links 29 will be raised or lowered so as to give the box lever l5 four different positions. Locking levers v cooperate with the crank plates 27 to lock the latter, said locking` levers being held down by springs 76 and being pivoted on fixed studs 77. The matter thus far described is a common form of the well-known Crompton .box motion and so-called cylinder motion trol lever 84; pivoted on a fixed stud 85.

The horizontal arm of said lever'8ll is connected to a lifting rod 86 which is in turn connected to pattern lever 8.7 pivotedi Qn the .Stud 43,. y f

The startingy Said member 8l is provided with a starting` tooth 8'8`f'ormed on any arm '89 which is guided in the slot 32v opposite the arm 33. Said starting tooth 88 is `substantially similar to Starting tooth 39` and when moved, to the left from the position shown in Fig. 3 will lie in the path ofthe leading tooth of the segment 23.

In the operation of my invention the tooth 88 will remain in the` position shown in Fig. 3. so long as the pattern calls for relatively broad stripes or a solid block of color but when the weave is to change so as to call the alternate pairs of picks of different colors the `pa'ttern chain 45 will liftwthe lever 87 against the action of coil spring 90 oiie'end of which is connected to the lever 84 and the other end of which passes through stud 85. The pattern chain 45 is built so as to call the multiplier chain at this time and the pattern chain will therefore come to restas previously explained. This willvleave both the starting teeth 39 and 88 in the olane of segment 23 as shown,

in Fig. 5 and` will leave starting tooth 88 inposition to be engaged by the leading tooth of segment 23. As the master gear 21 rotates the segment will engage tooth 88 and give the pinion 30 a half revolution and since all the teeth of segment A23 are required for this movement tooth 39 will be left iii position. to engage the segmentv23 ony the next revolution of the master gear 2l. So long as tooth 88 is in the position shown in Fig. 5, therefore, the pinion 30 will be given a halff'rotation every alternate pick of the loom.' For this reason the link 29 actuated by the pinionv 30 will remain up for two lpicks and then will be .lowered for `two picks'and will Ythen again be raised for two picks, this sequence prevailing sovlongy as it is desired to weave apattern having alternate pairs of picks of different kinds. l/Vhen it iS desired to return to the other part of the repeat the multiplier will start the' pattern chain so as to lower the lever 87 and permit spring 90 to movev the tooth 88 out of the plane of the segment 23. v

I have shown herein a box vmotion having two pinioiis andtwo segments on the master gear to operate four boxes on one side of the loom but it is well known that a box motion of this type can be employed to control four boxes where two of them are on one side of the loom and two on the other and I do not wish to be limited' to the showing herein where all ofthe boxes arel on one side of the loom.

As shown in Fig. 6 I have reiideied each of the supports 25 and shaft? 26 yieldable about theirstuds 2liy by providing a tension spring 91 held at one end `by a notch 92 vformed in the upperend of one of the levers 25 and held at the other end bv an eye bolt y93Y secured adjustably inthe upper end of 'short arm of the sliding member 35.

the otherl lever 25. Infthis way should the auxiliary tooth 88 be improperly positioned as it slides from the position shown in Fig. 3 to that shown in Fig. 5 the parts may move outwardly under the action of spring 91 to prevent breakage.

lt will be seen that by the structure set iorth herein it is possible to control the starting pinion trom either of two pattern levers, the lever 87 being additionalgrto the usual lever lr-2. In this way the designer ot the fabric has a choice oi two spaces on a pattern chain to control 'the starting teeth of one pinion. Such a control makes it possible to build the chain which controls the levers ft2 tor producing a. solid block oit color and then to introduce narrow" stripes of a different color by lifting lever 87 at selected intervals. A chain so built makes it possible byhaving the connections as shown between lever 87 and the starting teeth to weave with the stripe, but it the stripe is to be omitted and all other parts of the pattern ,remain the same the connector 86 may be detached from the lever 87 so as the latter rises it will be ineffective to move the auxiliary starting tooth.

From the foregoing it will be seen that I have applied an auxiliary sliding tooth to the well-known Crompton box motion in such a way as to permitthe weaving oit crepes and other fabrics calling for alternate pairs ofpiclrs ot different wefts by the vuse ot a multiplier, the auxiliary tooth cooperating with one of the segments of the ordinary master gear and being guided by a slot in the pinion which usually receives the lt will further be seen that the device lends itsel't naturally to use with the ordinary form ot slide 35 in that the shorter arm provides room for the auxiliary tooth 88m such position that the latter will be diametrically opposite the leading` tooth 39 ot the longer arm. It will further be seen that should the auxiliary tooth be improperly placed with respect to the segment provided therefor the parts can yield -to prevent breakage. Y,

Having thus described my invention it Vwill be apparent that changes and modifications may be made therein byv those skilled in the art without departing irom the spirit and scope of the invention, and I do not wish to be limited to the details herein disclosed, but what l `claim is:

l.' 'In a box controlling mechanism for looms having a set of shifting boxes andv a box lever to control the position or' the boxes, a member having a regular movement ina plane of action and completing its cycle of movement every second pick of the loom, a pinion to cooperate with the member and operatively connected to the lever to move the latter when said pinion receivesan angular movement, sliding starting teeth fior the pinion located onV diametrically opposite sides thereof, each tooth being movable into operative position with respect to the member havinga regular movement, and pattern controlled means Yto moveY and hold both ot said members in the plane oi the rotating member at the same time.

2. In a box controlling mechanism for looms having a` set of shitting boxes and a box lever to controlthe position of the boxes,- a regularly rotatingA master gear Vhaving a segment oit gear teeth moving'in a plane ot action and making a complete revolution every second pick ot the loom, a pinion operatively connected to the box lever, a pair ot starting teeth for the'pinion located on diametrically oppositel sides thereof, each of said teeth being movable into the plane of action ot the segment, and pattern con# trolled means to move both ot said starting teeth kin the plane ot the segment at the same time to cause said pinion to have a halt revolution for each complete revolution of Vthe segment, vwhereby the box lever will :be changed every second pick ot' the loom while said teeth remain in the same relative position with respect: to the pinion.

3. In a box controlling mechanism for looms having a set ot shifting boxes and a box lever to control. the position of the boxes, a segment of. gear teeth moving in a plane of actionand making a complete revolution every second pick ot the loom, a pinion to co-act therewith, connections between the pinion and the lever to move the latter when the pinion is given'ran angular movement, a pair of starting teeth located on opvposite sides ot the pinion, pattern mecha- Inism to control the starting teeth, said teeth remaining iny the same position relatively to the pinion when said pattern mechanismv is at rest, andconnections between the pattern mechanism and the teeth to move both of said teeth into the plane ot'action of the segment at the same time to Vcause said pin-Y ion to have a half revolution for each complete revolution of the segment, whereby the box Ylever will be given a` box changing movement every second picky ofthe loom while the pattern mechanism is at rest.

fl. In a box controlling mechanism for looms having a set of shifting boxes and a box lever to control the position of the boxes, a. segment ot' gear teeth moving'in'a plane ot'. action and making a completeV revolution every second pick of the loom,japinion to be operatively related to the segment, a pair of starting teeth for the pinion independently movable into operativeposition rela tively to the segment and with respect to each other, pattern mechanism to control the teeth, and connections from the pattern mechanism to the teeth to move both of Ythe teeth into the plane of action of the seg- Yrie ment at the Sametime to cause said pinion to lhave a. haltl revolution each second piek of the loom, whereby the box lever will be given a box changing movement every other pick of the loomfso long as the pattern mechanism holds the teeth inthe plane or' action of the teeth of the segment.

5. In a box controlling mechanism for looms having a set of shifting boxes anda box lever to control the position of the boxes, a constantly rotating segment of gear teeth moving in a plane of action and making arcomplete revolution every second pick of the loom, ai pinion operatively connected to the box lever and actuable by the segment,

a pair of independently movable starting teeth for the pinion and oppositely disposed withrespect to the pinion and each movable into the plane of action of the segment, pattern mechanism to move both of said teeth in the plane of action of the segment' at the same time to cause said pinion to have a box lever moving motion levery second pick of the loom while the pattern mechanism main'- tains both the teeth in the saidk plane of action, and multiplying mechanism for the pattern mechanism to determine-the number of picks during which both of said teeth shall remain in the plane of action of said "segment 6,. In a box controlling mechanism for looms having a set of shifting boxes and a box lever to contr-'ol the position ofthe boxes, a constantly rotating segment of gear teethV moving in a plane of action and havinga complete cycle of movement in an even number of? picks, va pinionl operatively connected to the box lever and actuable by the segment,.tworregular starting teeth for the pinion lying in differentA planes with respect to the plane of the pinionand movable together, said-teeth lyingon opposite sides ofv the pinion, andan auxiliary start-ing tooth-tor the pinionmovableindependently` of the irst named-teeth and movable into the-plane otone of said regular teeth, `pattern mechanism to control the position of all of' said? teeth, connections between the pattern mechanism and the teeth tovmove the auxiliary toot-h and one of the regular teeth into the plane of action of the segmentl to cause a hall revolution-of the pinion for each complete revolution of the segment, said auxiliaryy tooth being movable out of the plane of actionyof the segmentl and the other of said-V regular teeth-being movable into the plane of action of the segment, whereby said box lever can be givena box shiftingmovement for each revolution of the segment when one portion of the Apattern mechanismr is in control, the box lever having a diierent sequence of movements when another portion of the pattern mechanism is in controlr to move said other ofrthe regular teeth into the plane of: action ofthe segment.

7. In a box motion for looms having shifting boxes and a box lifting lever operatively connected thereto, a regularly moving' segment lof, gear teeth moving in a plane of action and having a complete revolution' in an even number of picks, a pinion operatively :connected to the box lever and actuable by the y segment, two separate starting devices independently movable with respect to each other to initiate movement of the pinion byV the loom, wherebyl the box leverwill shiftA the boxesevery time said segment has a completerevolution. v .v

8. Ina boxmotion for looms-having shifting boxes and a box-lifting leveroperaitively connectedthereto, aregularly moving segment of gear teeth moving inf af plane of action and yhaving a complete revolution lin an'even number of picks, apimon opera-y tively con'nected tothe box' leverA and actu'- ablel by the segment,. two separate startingl devices independently movable with respect to eachother. to initiate movement oI`Y the pinion byi the segment, the rst of said-l devicesy comprising two starting? teeth which lie vin diierentplanes with respect to the plane ot the segment, and' the other device comprising a singletooth, pattern mechanism to' move the" tirstv named device independently of;4 the secondy named devicej andV also-to'move saidl second named device and' one of theteeth of the' firstv named device into the planeof action ofv the segment' to causey a halt revolution of thepin-ion for each-pick ot the loom, whereby the box` lever will shift the boxes every time said segment has a complete revolution, and mult-iplier'v `mechanism to control' the pattern mechanism to determine the number' of picks during which the second namedde-vice will be in the plane of action of the segment'.

.9. Ina box motion for looms having a set off shiftingboxes andlabox'leverto control the' position thereof,` a constantly rotating segment ,of` gear teethmoving in'a'plan'e of action and making av complete revolution every. second-picket the loom, a' pinion operatively connected to the boxv lever and actuable by the segment, aV pair of starting devices' foi-'the pinion to initiate movement thereof" by the segment, the first of'said'devices'comprising`along and a short arm each' provided with a starting tooth, said starting teeth lying in diierentplanes with respectto the plane of action of the segment,`

arm of the first named device and the tooth on the second named device both intothe plane of action of the segment at the same time to cause said pinion to have a half revolution for each second pick 'of the loom, whereby the box lever is given a box shifting movement every'other pick of the loom while said starting teeth retain the same relative position with regard tothe plane of actioii'of the segment. f

' 10. In a box motion for loomshaving a plurality of shifting shuttles and a box lever to control the position of the same, a constantly rotating segment of gear teeth moving in a plane of action and having a complete revolution every second 'pick of the loom, a pinion operatively connected to the box lever and a-ctuable by the segment, two independently movable starting devices associated with the pinion and movable into operative `relation with respect to the segment to initiate angular movement of the pinion, one of said devices having two starting teeth lying on opposite sides of the pinion and in different planes with-respect to the plane of the pinion and the vother starting device having a single starting tooth, pattern mechanism to control the positionv of the first named device, connections from the pattern vmechanism to the second device to move the tooth thereof into they plane of action of the segment When oneofthe teeth of the first named device is'in the plane of action of the segment, and multiplying mechanism controlling the pattern mechanisinto determine the number of picks during which the starting tooth of the second named device shall lie in the plane of action of said segment, the starting tooth of the second device when in the plane of the segment cooperating with one of the teeth of the first named device to give the pinion Van operative movement every second pick of the loom to cause the box lever to initiate the boxes every other pick of the loom. p

1l. In a box motion for looms having shifting shuttle boxes and a pattern chain, a master gear rotating in a fixed plane, a sliding member forming part ofthe box motion and having starting teeth out of alignment with respect to each other relatively to the plane of movement of the master gear so that but one starting tooth may be operatively related to the master gear at a time, connections between the pattern chain and sliding member to determine the position of the latter, andan auxiliary sliding element also forming part of the box motion and having a start-ing tooth movable intov the planeof action of the master gear when one of theV first named starting teeth is in the plane of action ofthe master gear, whereby both starting teeth maybe engaged by the master gear While the pattern chain is aty rest. Y

12. ln a box motion for looms having shifting shuttle boxes and a pattern chain,`

a master gear moving in a fixed plane of rotation, a pair of starting` teeth under controlofv the pattern chain movable across the plane of action of the master gear and being,

out of line with each other so that but'one starting tooth may be operatively related at a time to the master gear,v and a third startshifting shuttle boxes and a Pattern Chaim a master 1gear moving inafixed plane of rotation, a pair ofstarting teeth fixed with respect' to each other and'under control of the pattern chain to be moved transversely of the plane Vof action of the master gear so that either of said pair of lstarting teeth may be operative'one at a time with respect to the master gear, and a third starting tooth movable independentlyof the first two starting teeth into andl out of the plane of action of the master gear, said third starting tooth and one ofthe pair of starting'teeth Vfirst named being'capable of both lying in the plane of action ofthe master gear to b e alternately actuated by the later while the pattern chain is at re-st.

14. In a box motion for loomshaving a master gear moving in a fixed plane of action, a pinion connected tol the box motion,

, a p aii" of members having sliding engageshifting shuttle boxesV and a pattern chain, Y

im Y

nient -with the pinion and movableV transversely of the plane of action of themaster gear, one `of said members having a pair of starting teeth lying on opposite sidesof the pinion and out of alignment with respect to each other relativelylto the plane' ofl the master geaiand the other member having a starting toothopposite one ofthe pair of teeth relatively'to the axis of the pinion, and a pattern chain lever for Veach member, said levers capable of moving two diametrically opposite starting` teeth into the plane of action of the master gear to cause continued rotation of the pinion by the master gear while the pattern chain is at rest.

15. In a loom box motion, a pattern chain, a pair of pattern levers each to be operated independently of the other by the chain, an actuating member, a pinion tobe operated by the member and forming part of the box motion7 andmeans operatively related to the pinion and controlled by the levers whereby either lever may Control said pinion to cause operative relation thereof with the actuating member.

16. In a box motion for a loom havingr a pattern chain, an actuating member, a pinion forming; part of the box motion, two sliding starting teeth for the pinion mov- 10 able relatively to each other, and a pattern lever for each starting tooth, said pattern levers beingr controlled independently of each other by the pattern chain, either pattern lever being capable of moving the starting tooth corresponding thereto into the path of the actuator to cause movement of the pinion by the actuator member.

In testimony whereof I have hereunto atiiied my si gnature. 

